projects / u-boot.git / blame
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1 | File: README.COBRA5272 |
| 2 | Author: Florian Schlote for Sentec elektronik ([email protected]) | |
| e6ff998c | 3 | Contents: This is the README of U-Boot (Universal bootloader) for our |
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4 | COBRA5272 board. |
| 5 | Version: v01.00 | |
| 6 | Date: Tue Mar 30 00:28:33 CEST 2004 | |
| 7 | License: This document is published under the GNU GPL | |
| 8 | ______________________________________________________________________ | |
| 9 | ||
| 10 | CHANGES | |
| 11 | 040330 v01.00 Creation | |
| 12 | ||
| 13 | ______________________________________________________________________ | |
| 14 | ||
| 15 | ||
| 16 | CONFIGURING | |
| 17 | ----------- | |
| 18 | ||
| 19 | 1. Modify include/configs/cobra5272.h acc. to your prefs | |
| 20 | ||
| 21 | 2. If necessary, modify board/cobra5272/config.mk (see below) | |
| 22 | ||
| 23 | 3. | |
| 24 | ||
| 25 | > make cobra5272_config | |
| 26 | ||
| 27 | > make | |
| 28 | ||
| 29 | ||
| 30 | Please refer to u-boot README (general info, u-boot-x-x-x/README), | |
| add83917 | 31 | to u-boot-x-x-x/board/cobra5272/README and |
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32 | to the comments in u-boot-x-x-x/include/configs/cobra5272.h |
| 33 | ||
| e6ff998c | 34 | Configuring U-Boot is done by commenting/uncommenting preprocessor defines. |
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35 | |
| 36 | Default configuration is | |
| 37 | ||
| 38 | FLASH version (for further info see subsection below) | |
| 39 | link address 0xffe00000 | |
| 40 | ||
| 41 | 16 MB RAM | |
| 42 | ||
| 43 | network enabled | |
| 44 | no default IP address for target, host set, no MACaddress set | |
| 45 | ||
| 46 | bootdelay for autoboot 5 sec. | |
| 47 | autoboot disabled | |
| 48 | ||
| 49 | ||
| 50 | #----------------------------------- | |
| e6ff998c | 51 | # U-Boot FLASH version & RAM version |
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52 | #----------------------------------- |
| 53 | ||
| e6ff998c | 54 | The U-Boot bootloader for Coldfire processors can be configured |
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55 | |
| 56 | 1. as a standalone bootloader residing in flash & relocating itself to RAM on | |
| 57 | startup automatically => "FLASH version" | |
| 58 | ||
| 59 | 2. as a RAM version which will not load from flash automatically as it needs a | |
| 60 | prestage bootloader ("chainloading") & is running only from the RAM address it | |
| 61 | is linked to => "RAM version" | |
| 62 | ||
| e6ff998c | 63 | This version may be very helpful when installing U-Boot for the first time |
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64 | since it can be used to make available s. th. like a "bootstrap |
| 65 | mechanism". | |
| 66 | ||
| 67 | ||
| 68 | How to build the different images: | |
| 69 | ||
| 70 | ------------------------------ | |
| 71 | Flash version | |
| 72 | ------------------------------ | |
| 73 | ||
| e6ff998c | 74 | Compile U-Boot |
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75 | |
| 76 | in dir ./u-boot-x-x-x/ | |
| 77 | ||
| 78 | please first check: | |
| 79 | ||
| e52fca22 | 80 | in ./configs/cobra5272_defconfig |
| a562e1bd | 81 | |
| e52fca22 | 82 | CONFIG_MONITOR_IS_IN_RAM has to be not present in the file |
| a562e1bd | 83 | |
| e6ff998c | 84 | => U-Boot as single bootloader starting from flash |
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85 | |
| 86 | ||
| e52fca22 | 87 | in configs/cobra5272_defconfig CONFIG_TEXT_BASE should be |
| a562e1bd | 88 | |
| e52fca22 | 89 | CONFIG_TEXT_BASE=0xffe00000 |
| a562e1bd | 90 | |
| e6ff998c | 91 | => linking address for U-Boot as single bootloader stored in flash |
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92 | |
| 93 | then: | |
| 94 | ||
| 95 | host> make cobra5272_config | |
| 96 | rm -f include/config.h include/config.mk | |
| 97 | Configuring for cobra5272 board... | |
| 98 | host> make | |
| 99 | [...] | |
| 100 | ||
| 101 | host> cp u-boot.bin /tftpboot/u-boot_flash.bin | |
| 102 | ||
| 103 | ||
| 104 | ------------------------------ | |
| 105 | RAM version | |
| 106 | ------------------------------ | |
| 107 | ||
| 108 | in dir ./u-boot-x-x-x/ | |
| 109 | ||
| 110 | host> make distclean | |
| 111 | ||
| 112 | please modify the settings: | |
| e52fca22 | 113 | in ./configs/cobra5272_defconfig |
| a562e1bd | 114 | |
| e52fca22 | 115 | CONFIG_MONITOR_IS_IN_RAM now has to be enabled, e. g. as follows: |
| a562e1bd | 116 | |
| e52fca22 | 117 | CONFIG_MONITOR_IS_IN_RAM=y |
| a562e1bd | 118 | |
| e6ff998c | 119 | => U-Boot as RAM version, chainloaded by another bootloader or using bdm cable |
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120 | |
| 121 | ||
| e52fca22 | 122 | in configs/cobra5272_defconfig CONFIG_TEXT_BASE should be |
| a562e1bd | 123 | |
| e52fca22 | 124 | CONFIG_TEXT_BASE=0x00020000 |
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125 | |
| 126 | => target linking address for RAM | |
| 127 | ||
| 128 | ||
| 129 | then: | |
| 130 | ||
| 131 | host> make cobra5272_config | |
| 132 | rm -f include/config.h include/config.mk | |
| 133 | Configuring for cobra5272 board... | |
| 134 | host> make | |
| 135 | [...] | |
| 136 | ||
| 137 | host> cp u-boot.bin /tftpboot/u-boot_ram.bin | |
| 138 | ||
| 139 | ||
| 140 | ---- | |
| 141 | HINT | |
| 142 | ---- | |
| 143 | ||
| 144 | If the m68k-elf-toolchain & the m68k-bdm-gdb is installed you can run the RAM | |
| 145 | version by typing (in dir ./u-boot-x-x-x/) | |
| 146 | "board/cobra5272/bdm/load-cobra_uboot" , | |
| 147 | in ./u-boot-x-x-x/ the RAM version u-boot (elf format) has to be available. |